I own two Tesla vehicles with FSD. One misconception by people without experience with Tesla is that it is not Human vs. Machine. Rather it is Human AND machine. In other words we are not at the point where the car drives itself, rather the Human also must be engaged all the time so each system backs up the other. The Tesla system does allow for the Human to switch focus for a couple moments to change the music or read a text message which in a normal car just means the Human is distracted for a moment. The Tesla system is definitely not fully self driving by any means. I have experienced numerous times wher the car has reacted in strange ways or simply canceled self driving and told me to take over immediately. As a result I don’t trust it very much and I pay as much attention when the car is driving as when I am driving alone. The vehicle also forces constant interaction as it drives to reinforce that point. I am not surprised that “human + machine” is better than just human alone.